Bill passes along a link to an exchange of letters that evidently took place c. 635 A.D. between an Arab Muslim Caliph named Omar Ibn-Kat'tab and an Iranian (Persian) ruler named Yazdgerd III. The first letter is an ultimatum from the Caliph demanding the surrender of the Iranians to Islam. The second is Yazdgerd's wonderful and heroic reply. Here's the ultimatum:
Bism-ellah Ar'rahman Ar'rhim
To the Shah of the Fars
I do not foresee a good future for you and your nation save your acceptance of my terms and your submission to me. There was a time when your country ruled half the world, but see how now your sun has set.
On all fronts your armies have been defeated and your nation is condemned to extinction. I point out to you the path whereby you might escape this fate. Namely, that you begin worshipping the one god, the unique deity, the only god who created all that is.
I bring you his message. Order your nation to cease the false worship of fire and to join us, that they may join the truth.
Worship Allah the creator of the world. Worship Allah and accept Islam as the path of salvation. End now your polytheistic ways and become Muslims that you may accept Allah-u-Akbar as your savior.
This is the only way of securing your own survival and the peace of your Persians. You will do this if you know what is good for you and for your Persians.
Submission is your only option
Allah u Akbar
The Calif of Muslims Omar Ibn-Khat'tab
Read Yazdgerd's response at the link. May the Yazdgerds of the world increase, and may all the Omars follow Yazdgerd's excellent advice.